What Are Fan Coils?

At its most basic, a fan coil unit is the simple combination of a fan and heat exchanger (the coil). It is used in commercial, residential, and industrial buildings.

A fan coil unit is a self-contained unit, as opposed to air handling units, which are part of a larger HVAC system. As such, it does not use ducts and recirculates air to affect temperature change. The air is either heated or cooled as it passes over the fan coils, and the fan itself ensures the circulation progress is continuous, resulting in an eventually uniform air temperature.

The two types of fan coil units, blow through and draw through, refer to the manner in which their circulated air is passed over the coils.

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